我在codechef上提交此代码时遇到NZEC错误

Question

This is the problem, for which the code is below written in Python 2.7.6      This is the example Input and output for the same problem.

这是代码，在我的机器上工作正常。但是在Codechef中提交它时会出现一个名为NZEC错误的问题，我不熟悉并且不知道如何调试它。

##Reverse Function

def reverse(member):
    if len(member) <= 1:
        return member
    return reverse(member[1:]) + member[0]

##Sum of Position

def positionsum(member):
    checker = len(member)/2
    realsum = 0
    while checker != -1:
        realsum = checker + realsum + 1
        checker = checker - 1
    return realsum

##Sum of those values at that Position

def valuesum(member):
    checker = len(member)/2
    sumis = 0
    while checker != -1:
        sumis = int(member[checker]) + sumis
        checker = checker - 1
    return sumis


stop = 0

##Entering Cases

inp = int(raw_input(''))
lst = list()

##INPUT OF ALL THE MEMBERS & STRIPS

while (inp > stop):
    member = ''

    ##Entering Strips

    strips = int(raw_input(''))

    ##Entering Members

    member = raw_input('')

    if len(member) > strips:
        print 'Wrong Input'
        continue

    lst.append(member)
    stop = stop + 1
print lst

##CHECKING FOR ELIGIBILITY

for member in lst:
    new_string = ''
    real_sum = 0
    sum_is = 0

    if len(member)%2 != 0 and member[0] == '1':
        new_string = reverse(member)
        real_sum = positionsum(member)
        sum_is = valuesum(member)
        if member == new_string and real_sum == sum_is:
            print 'yes'
        else:
            print 'no'
    if member[0] != '1' or len(member)%2 == 0:
        print 'no'